vigorous
adjective
full of or characterized by vigor.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
His bow tie, suspenders and owlish glasses compound his already unvigorous features and oatmeally complexion, and he’s spectrally thin, so the most common Kimball descriptor is “nerd.”
From New York Times ● Oct. 14, 2012